feat: 添加对自定义 baseURL 的支持

- 在 config.ts 中添加 baseURL 解析器
- 在 openai.ts 中更新 createChatCompletion 和 generateCommitMessage 函数
- 在 aicommits.ts 中传递 baseURL 参数
- 支持使用自定义 API 端点替代默认的 OpenAI API

src/commands/aicommits.ts

@@ -73,7 +73,8 @@ export default async (
 				config['max-length'],
 				config.type,
 				config.timeout,
-				config.proxy
+				config.proxy,
+				config.baseURL
 			);
 		} finally {
 			s.stop('Changes analyzed');

src/utils/config.ts

@@ -115,6 +115,21 @@ const configParsers = {
 
 		return parsed;
 	},
+	baseURL(url?: string) {
+		if (!url || url.length === 0) {
+			return 'api.openai.com';
+		}
+		
+		parseAssert('baseURL', /^https?:\/\/.+/.test(url), 'Must be a valid URL');
+		
+		// 如果用户输入完整URL，提取域名部分
+		try {
+			const urlObj = new URL(url);
+			return urlObj.hostname;
+		} catch {
+			return url;
+		}
+	},
 } as const;
 
 type ConfigKeys = keyof typeof configParsers;

src/utils/openai.ts

@@ -71,10 +71,12 @@ const createChatCompletion = async (
 	apiKey: string,
 	json: CreateChatCompletionRequest,
 	timeout: number,
-	proxy?: string
+	proxy?: string,
+	baseURL?: string
 ) => {
+	const hostname = baseURL || 'api.openai.com';
 	const { response, data } = await httpsPost(
-		'api.openai.com',
+		hostname,
 		'/v1/chat/completions',
 		{
 			Authorization: `Bearer ${apiKey}`,
@@ -139,7 +141,8 @@ export const generateCommitMessage = async (
 	maxLength: number,
 	type: CommitType,
 	timeout: number,
-	proxy?: string
+	proxy?: string,
+	baseURL?: string
 ) => {
 	try {
 		const completion = await createChatCompletion(
@@ -165,7 +168,8 @@ export const generateCommitMessage = async (
 				n: completions,
 			},
 			timeout,
-			proxy
+			proxy,
+			baseURL
 		);
 
 		return deduplicateMessages(